You don't need to worry about donating anything, I actually have never accepted donations. If you want to send some money, please send it to a charity you feel is worthwhile. If you really want to pay me back, please read as much as you can on everything and try to help others out when they ask questions or need help. The S4 Active is a small community, so we need as many people contributing to the forums as possible.
If you run into trouble with Odin or anything, let me know.